Charles g



Patented Oct. 22, 1895.

UNITED STATES PATENT OFF CE.

CHARLES e. PAGE, oE CHICAGO, ILLINOIS.

CEMENT-INJECTOR FOR REPAIRING PNEUMATIC TIRES.

SPECIFICATION forming part of Letters Patent No. 548,268, dated October 22, 1895. Application filed my 9, I895. Serial No. 555,361. (Nomodelfi To all whom it may concern..-

Be it known that I, CHARLES G. PAGE, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a certain new and useful Improvement in Cement-Injectors for Repairing Pneumatic Tires, of which the following is a specification.

My invention relates to cement-injectors such as described in Letters Patent of the United States to Ernest W.Young, No. 537,099, dated April 9, 1895.

The object of my invention is to avoid reversing the plunger and thereby prevent the fingers of the user from coming in contact with such cement as may be left on the same, and, further, to provide an arrangement whereby the needle can be in position for use without reversing the plunger; also, to arrange the parts so that they can, when not in use, be protected from dust.

To the attainment of the foregoing and other useful ends, I provide, in connection with the cement-cup having a discharge-nozzle, a plunger having a bore in which the needle is arranged to work, so that when the plunger is to be moved in a direction to force the cement through the discharge-nozzle the needle can be moved back and out of the latter.

In the accompanying drawings, Figure 1 represents in side elevation a cement-injector embodying my invention. Fig. 2 represents the same in central longitudinal section. Fig. 3 is a like view showing the cup filled with cement and the plunger in position to be moved inwardly, the needle being drawn back. Fig. at is a central longitudinal section of the device with the bore through the plunger and the needle, both threaded.

The cement-cup A is provided with a small tubular discharge-nozzle a. The plunger B works within the cement-cup, and preferably the inner wall of the cup 7 and the perimeter of the plunger are correspondingly screwthreaded, so that the plunger can be screwed into and out of the cup. The plunger is provided with a centrally-arranged bore or passage b, through which the needle 0 is arranged to work. Preparatory to inserting the discharge-nozzle into a pneumatic tire, the nee= dle will be in position to form a sharp point for the nozzle, as in Figs. 1, 2, and 4.. After the nozzle has been introduced into the tire the operator will remove the plunger from the cup, drop a small quantity of cement into the latter, draw back the needle, as in Fig. 3, and introduce the plunger within the cup, so as to cause the cement to be ejected through the nozzle.

Any suitable stop device can be provided for limiting the extent to which the needle can be drawn back. For example, the needle can be formed with a reduced portion 0, so as to provide it with a shoulder c, which will abut against a shoulder b at one end of the bore 1) in the plunger.

As another form of stop, broadly considered, the needle and the bore through the plunger can be correspondingly threaded, as in Fig. 4, so that the needle can be screwed back and forth, as may be desired.

When not in use, the plunger can be screwed down, as in Figs. 1, 2, and 3, and the needle can be pushed or screwed in,so as to terminate short of the end of the nozzle, thereby avoiding a sharp point at the end of the latter and permitting the rider to carry the device in his pocket, if he so desires. Just before use, however, a slight movement given to the needle will cause its point to project from the discharge-nozzle. The plunger is also desirably provided with an enlarged head or end 19 which will fit against the receiving end of the cup when the plunger is fully pushed or screwed into the same, thereby protecting the plunger from dust. The needle can also be provided with a cap or head 0 It will be seen that in using the device the operator need only handle the end I) of the plunger, and also that the needle is conveniently arranged for service. The inner wall of the cup and the perimeter of the plunger could be unthreaded; but these parts are preferably threaded, substantially as shown.

hat I claim as my invention is- 1. A cement injector comprising the cement cup provided with a discharge nozzle, a plunger for ejecting the cement, and a needle for the purpose set forth arranged to work through an opening in the plunger, substantially as described.

2. A cement injector comprising the cement cup provided with a discharge nozzle, a plunger for ejecting thecement, a needle for the- 3. A cement injector comprising the cement cup having a discharge nozzle, alplunger for ejecting the cement, and a threaded needle arranged to work within a threaded bore in the plunger, substantially as and for the pur-- pose set forth.

4. A cement injector comprising thecement cu-p A havi-n g a nozzle a the plunger provided with an enlarged end 12 and having a bore from end to end, and the needle arranged to 15 work within such bore of the plunger, substantially as described.

CHARLES G. PAGE. Witnesses:

ll/IARGARET M. WAGNER, A. F. DURAND. 

